<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{
      width: 100px;height: 100px;
      border: 1px solid red;
    }
    span{
      width: 100px;height: 100px;
      border: 1px solid blue;
      /*如果有需求必须改动行内元素的宽高 则可以通过修改display的值
      的方式,把元素的显示方式改成块级元素或行内块元素后 就可以修改了*/
      display: inline-block;
    }
    img{
      width: 100px;
      height: 100px;
        /*隐藏元素*/
        display: none;
    }
  </style>
</head>
<body>
<img src="../b.jpg" alt="">
<img src="../b.jpg" alt="">
<img src="../b.jpg" alt="">
  <div>div1</div>
  <div>div2</div>
  <div>div3</div>
  <span>span1</span>
  <span>span2</span>
  <span>span3</span>
</body>
</html>